How to Become an Approved Tester

Our requirements:
We only accept backflow test results from testers who are on our Approved Backflow Tester List.

Become a CWS-approved backflow tester:
1. Complete SCDHEC certification.
2. Attend a CWS orientation session. Contact us for more info.
3. Follow our policies and procedures as outlined in our Cross Connection Control Program Manual
4. Tester recertification is required every three years ($80 fee.)

Backflow Tester Orientations:
They're held at 103 St. Philip Street, Charleston, SC 29403. Contact us to register for the dates below at

October 18
December 1

January 17
April 17
July 17
October 16

Tester Recertification:
To remain on our Approved Backflow Tester List, you must complete recertification every three years. CWS is a SCDHEC backflow recertification site, and we hold recertification tests quarterly at our main office, 103 St. Philip Street, Charleston, SC 29403. The fee is $80.

To register for a session below, email us at

September 20 Recertification Letter (PDF)
December 6 Recertification Letter (PDF)

March 20 Recertification Letter (PDF)
June 19 Recertification Letter (PDF)
September 18 Recertification Letter (PDF)
December 18 Recertification Letter (PDF)